AnsweredAssumed Answered

ls1046a using emmc as boot source

Question asked by jingjia shi on Feb 15, 2020
Latest reply on Feb 15, 2020 by ufedor


In  my coustom board,I use emmc/sd as boot source.but i don't use SDHC_CD_B always board is refer to ls1046ardb board.

Now I can boot from sd card ,but i can't boot from emmc.

why I can boot from sd? the SDHC_CD_B pin is floating  And Why I can't boot from emmc,Is it because PBL has special regulations for this pin?

in spec,when use sdhc as boot source, SDHC_CD_B pin be serve as the SDHC_CD_B pin for the eSDHC controller. This happens automatically when the microSD card is selected as the boot source for the board.